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J/MNRAS/344/283     100-Mpc-scale structures of radio galaxies  (Brand+, 2003)
Two 100-Mpc-scale structures in the three-dimensional distribution of
radio galaxies and their implications.
    Brand K., Rawlings S., Hill G.J., Lacy M., Mitchell E., Tufts J.
   <Mon. Not. R. Astron. Soc. 344, 283 (2003)>
   =2003MNRAS.344..283B
ADC_Keywords: Clusters, galaxy ; Active gal. nuclei ; Galaxies, radio ;
              Redshifts
Keywords: galaxies: active - cosmology: observations -
          large-scale structure of Universe - radio continuum: galaxies

Abstract:
    We present unequivocal evidence for a huge (∼80x100x100Mp3)
    superstructure at redshift z=0.27 in the three-dimensional
    distribution of radio galaxies from the Texas-Oxford NVSS Structure
    08h region (TONS08) sample, confirming tentative evidence for such a
    structure from the 7C redshift survey (7CRS). A second, newly
    discovered superstructure is also found less securely at redshift 0.35
    (of dimensions ∼100x100x100Mpc3). We present full observational
    details on the TONS08 sample which was constructed to probe structures
    in the redshift range 0<z<0.5 by matching NVSS sources with objects
    in APM catalogues to obtain a sample of optically bright (E∼R≤19.83),
    radio-faint (1.4GHz flux density S1.4≥3mJy) radio galaxies in the
    same 25deg2 area as part II of the 7CRS.

Description:
    The TONS08 survey is in one of the areas covered by the 7CRS (Willott
    et al., 2002MNRAS.335.1120W) and the TexOx-1000 (TOOT) survey (Hill &
    Rawlings, 2002, ASP Conf. Proc., Leiden. Astron. Soc. Pac., San
    Francisco). It covers the region 08h 10m 20s ≤ RA ≤ 08h 29m 20s and
    24° 10' 00" ≤ DE≤ 29° 30' 00" (J2000). Unlike the
    low-frequency-selected 7CRS and TOOT, the TONS08 survey is selected at
    1.4GHz from the NVSS.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat       137       84   A summary of key information on the TONS08 sample


See also:
     VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
     VIII/71 : The FIRST Survey, version 03Apr11 (Becker+ 2003)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units      Label     Explanations

   1-  6  A6    ---        ---       [TONS08]
   8- 11  I4    ---        TONS08    TONS08 number
      12  A1    ---        m_TONS08  [ab] Multiplicity index on TONS08 (1)(2)
      13  A1    ---        n_TONS08  [*] *: Note on TONS08 288 (3)
  14- 21  A8    ---        Tel       Telescope (4)
  23- 32  A10 "YYYY/MM/DD" Date      Observation date
      33  A1    ---        ---       [-]
  34- 43  A10 "YYYY/MM/DD" Date2     Second observation date when interval
  45- 46  I2    h          RAh       Right ascension (J2000) (1)
  48- 49  I2    min        RAm       Right ascension (J2000) (1)
  51- 55  F5.2  s          RAs       Right ascension (J2000) (1)
      57  A1    ---        DE-       Declination sign (J2000) (1)
  58- 59  I2    deg        DEd       Declination (J2000) (1)
  61- 62  I2    arcmin     DEm       Declination (J2000) (1)
  64- 68  F5.2  arcsec     DEs       Declination (J2000) (1)
  70- 75  F6.1  mJy        SNVSS     Integrated radio flux density in the NVSS
                                      (Cat. VIII/65) catalog (1.4GHz)
  77- 83  F7.2  mJy        SFIRST    ? Integrated radio flux density in the
                                       FIRST (Cat. <VIII/71 >) catalog (2)
  85- 89  F5.2  mag        Omag      Blue O magnitude (APM corrected magnitude)
  91- 95  F5.2  mag        Emag      Red E magnitude (APM corrected magnitude)
  97-101  F5.3  ---        z         Redshfit estimated by identifying lines by
                                      eye and calculating the mean redshift
 103-108  F6.4  ---        zc        ? Redshift obtained by cross-correlating
                                       the spectra with the combined
                                       deredshifted spectra
     109  A1    ---        n_zc      [?] ? denotes that the cross-correlation
                                           was unsuccessful
 111-116  F6.4  ---        zsed      ? Redshfit obtained by cross-correlating
                                       the spectra with the GISSEL model,
                                       (Bruzual & Charlot, 1993ApJ...405..538B
 118-137  A20   ---        Note      Notes (5)

Note (1): The positions are that of the radio positions except in the
    case of multiple sources where the positions are from APM.
Note (2): In cases where FIRST resolves out multiple components, SFIRST
    is the total integrated flux density.
Note (3): The NVSS entry for TONS08 288 seems to be the confusion of two
    separate radio sources - the given redshift is for the ID of the
    brighter, double-lobed radio source, but both sources have APM IDs. 
    We are awaiting spectroscopic confirmation that the other object is 
    at a similar redshift.
Note (4): Telescopes:
    NOT: 2.6-m Nordic Optical Telescope
    WHT: 4.2-m William Herschel telescope
    2.7: 2.7-m Smith reflector at McDonald
Note (5): The notes denote the name of the object in other samples or
    lines identified.

    Spectra of the TOOT objects will be presented in Rawlings et al. (in
    preparation); Spectra for the 7CRS objects can be found in Willott et
    al. (2002MNRAS.335.1120W). The redshift of 3C200 is reported in Laing,
    Riley & Longair (1983MNRAS.204..151L).


History:
    From electronic version of the journal
(End)                         James Marcout, Patricia Bauer [CDS]    25-Sep-2003